TCP/IP loopback device

TCP/IP loopback device

A loopback device is a simulated TCP/IP adapter. If you don't have a loopback device and you're not connected to a LAN/provider then you can't run TCP/IP software.

Place the following line in your CONFIG.SYS to create a loopback device:

RUN=c:\tcpip\bin\ifconfig.exe lo 127.0.0.1 If you want your PC to have a name, also modify or create the \TCPIP\ETC\HOSTS files with something like:

#
# IP addresses and names
#
127.0.0.1       my-pc
# end

If you have an IP address assigned to you then use that one instead of 127.0.0.1.